WHY UP↑SCALE › FOR WHAT? › CANNABIS SCALE APP: WEED IN GRAMS, EIGHTHS & MG THC
The cannabis scale app: weed in grams, eighths and mg of THC
A weed scale app for your phone, tablet or computer - free in the browser, no account, works offline. Weigh in grams, eighths or ounces and see the price and the milligrams of THC and CBD with every gram, weigh your jar without opening it, dose your edibles by weight, follow the drying and print a clean label. Where cannabis is legal: at home, in a shop or in a club.
A weed scale app does what a pocket scale can't
A digital pocket scale shows a number. The scale app knows what is on the scale - and does the maths for you.
⅛ Grams, eighths, ounces
Switch the unit with one click - the scale weighs in ⅛ eighths too, next to grams, ounces and milligrams.
🌿 mg of THC and CBD
Type in the lab values of your strain once: every weighing shows its milligrams of THC and CBD - and the share in %.
🫙 The jar knows its weight
The empty jar is saved with the strain: put the full jar on the scale and see what is inside, without opening the lid.
💰 The price, live
The price of what is on the scale, in one or several currencies - also in eighths.
🧈 Edibles by weight
Cannabutter and oil with a known strength in mg per gram, and portions of exactly 5 or 10 mg of THC.
🏷 A label for the bag
Weight, price, THC / CBD, the lot and warning symbols - right after weighing.
Weigh weed in grams, eighths and ounces FREE
How many grams are in an eighth? You don't have to remember it: choose ⅛ eighths as the unit and the scale weighs in eighths - with the price and the THC of that amount at the same time. Grams, ounces, milligrams, carats, grains and more are one click away, and your favourite unit can be saved on the scale for every phone.
| Amount | Of an ounce | In grams |
|---|---|---|
| An eighth | ⅛ oz | 3.54 g (in everyday talk 3.5 g) |
| A quarter | ¼ oz | 7.09 g |
| A half | ½ oz | 14.17 g |
| An ounce | 1 oz | 28.35 g |
1 ounce = 28.35 g, so an eighth is 28.35 ÷ 8 = 3.54 g. On a label the app can print the net weight in both systems, e.g. 3.54 g (0.12 oz).
Manual: weighing units, US + metric on the label
How much THC is in a gram? The mg of THC on the scale, live FREE
Save your strain as a THING with the box 🌿 CANNABINOIDS: the content from the lab report in milligrams per gram - THC and CBD on top, CBG, CBN, THCV and more below. From then on every weighing shows the milligrams of what is on the scale.
- From % to mg: 1 % on the lab label is 10 mg per gram. A strain with 21 % THC has 210 mg per gram - so 3.5 g on the scale show 735 mg of THC, and the share in % next to it.
- THCA or THC? The label of raw flower mostly shows THCA. Heated, it turns into THC and loses 12.3 % of its weight: THC after decarbing = THC % + THCA % × 0.877. The free infusion calculator does it for you.
- Every lot its own value: a lot of the lot store can carry its own THC / CBD from its lab report - while the lot is chosen it replaces the values of the strain.
- Any other value too: any other substance of your lab report, or the costs - every unit of the THING shows live with the weight.
Manual: metric units, lab values of a lot
Weed jar with a scale: what is inside, without opening it FREE
- The empty jar is saved with the strain (the container unit, with or without the lid - the way you weigh it). Put the full jar on the scale: the app takes the jar off and shows the weed inside, its THC and its value.
- A QR code on the jar: print the QR label of the THING and stick it on. Scan it with the 📷 of the app and the scale knows the strain, its price, its THC and its jar - specially made for those of us who tend to forget a thing or two.
- Take some out: switch on the ↰ TAKE-AWAY mode and the scale shows what you take out of the jar - and its exact price - instead of what is left.
Manual: container / jars, QR code labels, take-away mode
The price of every gram - and the sales of the day FREETRY 14 DAYS FREEPRO+ ENTERPRISE
Add the price per gram to the strain and the scale shows the price of what is on it, live - in as many currencies as you like at the same time, and also while you weigh in eighths (in the screenshot above: 1.20 eighths at 35.00 EUR per eighth = 42.00 EUR).
- Free: the live price, the costs of every weighing in the log, prices on the labels.
- The sales mode (PRO, 14 days free to try): big weight, big price, BOOK NOW - every sale saved on the scale with the time, the strain, the lot, the weight and the price.
- The sales log adds it up on the scale: by strain, day, user or every single sale - pieces, grams, revenue, costs, profit and margin. With ENTERPRISE every budtender logs in and the sealed report shows every sale with gross, tare and net.
Selling by weight to the public needs a verified scale - see where it is legal.
Manual: prices, sales mode, sales log · Sealed sales records →
Edible dosage calculator: cannabutter, oils and tinctures by weight FREETRY 14 DAYS FREEPRO
How do you calculate the THC in homemade edibles? Weigh every step instead of guessing with spoons. The 🌿 infusion calculator in the app (free) turns your cannabis and your fat into an infusion with a known strength in mg per gram - and saves it as a THING on the scale.
- The cannabis: flower, trim, kief, hashish, rosin, distillate or extract - weighed, with the THCA and THC % of its lab label (and CBD, CBG, CBN ... if you like). THCA counts with the decarb factor 0.877.
- The fat or solvent: butter, ghee, coconut or MCT oil, olive oil, cocoa butter, glycerin or alcohol - each with a preset extraction efficiency (rough values: 70-85 % for fats and alcohol, 50 % for glycerin). Your own value replaces it.
- The strained infusion on the scale: the result shows the mg of every cannabinoid per gram, per teaspoon and per tablespoon. Got it tested by a lab? The lab value replaces the estimate and shows the real extraction efficiency of the batch.
- Save it as a THING: from then on you weigh your butter or oil directly in mg of THC, your recipes show the mg per portion and the label prints the dose and the ingredients.
- mg of THC per serving: the servings calculator splits a batch into portions of exactly 5 or 10 mg (or 250 mg cookies) and shows the weight of one portion and how many you get. Planning ahead? Step 5 of the calculator says how much of your infusion goes into a recipe and how much plain fat fills up the rest.
- Even portions = even doses: the factory mode fills a mold cavity by cavity with the mg per cavity and the averages (PRO, 14 days free to try). The scale can only weigh - mix the batch well.
- Your daily mg: the nutrition diary keeps THC like any other unit, with a daily limit per person if you set one (free).
⚠ Only an estimate: the real strength depends on the flower, the decarb and the infusion - for a known strength, get your infusion tested by a lab. No medical advice.
Manual: infusion calculator, lab-tested infusion, servings calculator, mg per cavity, THC in the diary
Wet to dry weight: follow the drying and curing TRY 14 DAYS FREEPRO
How much weight does cannabis lose when it dries? Put the rack or the curing jar on the scale and start the tracking mode with the 🌿 drying / curing preset: the scale records the weight by itself, for days - even with the app closed and after a power cut.
- The target from your numbers: the dry matter of your material (your own estimate: fresh flowers have about 20-25 %, so 75-80 % water) and the final moisture you want (10-12 % is usual). Target = start weight × dry matter ÷ (100 % − final moisture) - e.g. 1,000 g fresh with 22 % dry matter, dried to 11 %: about 247 g.
- The estimated moisture live, a chart over days, a prediction when the target is reached and an alarm when it is.
- In a club: the harvest (fresh) and the dried weight are booked on the same lot - the lot report shows the drying loss in %.
The free version records 15 minutes in a row, then pauses for 10 minutes; PRO records without a limit (the 14-day trial of the scale too).
Manual: tracking mode, drying preset
Cannabis labels: weight, price, THC and warning symbols FREEPRO
Set up your label once - at every print the current weight and all values are filled in.
- The strain, the exact net weight (also US + metric), the price, THC / CBD in mg and %, the lot with a small lot code, your logo and your own texts.
- CANNABIS WARNING: three symbols in one row - no driving, a warning triangle with "! THC" and 18+. These are our own symbols; add the official ones of your state or country as a picture.
- Straight to your label printer - wireless, USB or serial, no driver (PRO). Free: save the label as a PNG picture (with a small "FREE VERSION" line).
- QR labels for the jars are free: they say what is in the jar and stay on it.
You are responsible for your labels: which texts and symbols your packages need is set by the cannabis rules of your state or country.
Manual: labels, warning symbols, lot code, label printers
Stock, lot numbers and the loss per strain FREETRY 14 DAYS FREEPRO
- Stock by weight: every jar with its empty weight in the 📦 inventory - after a lot of sales put each jar on the scale and see what was sold, what should be left and how much "evaporated" (drying, crumbs, mistakes). 5 items are free, up to 250 with PRO.
- Lot numbers: every THING can carry a lot, typed in or scanned - on every label and in every line of the log (free). With PRO the scale keeps a lot store of up to 420 lots with a number generator, use-by dates, its own price and THC / CBD per lot.
- Saved on the scale: every phone and every counter sees the same numbers. Export as CSV with PRO.
Manual: inventory for cannabis shops, lot number, lot store
In a cannabis club or a dispensary
The same scale grows with you - from the jar at home to the counter of a shop and the records of a club.
🥦 Cannabis social clubs
The CCLUB 🥦 MODE books harvest (fresh), dried, destroyed and every dispensing while you weigh - with member ID, lot, grams and THC / CBD, limits per day and month, lot report and the sums of the year. TRY 14 DAYS FREEPRO+ ENTERPRISE
📋 KCanG documentation
For the Anbauvereinigungen in Germany: the whole workflow and a checklist of every record point of § 26 KCanG - done while weighing, tamper-evident with ENTERPRISE.
🏪 Dispensaries & cannabis shops
Weigh out of the jar with the exact price, a label for every bag, the stock and loss per strain, the sales of the day - and the package check of pre-packed flower along NIST Handbook 133.
🧈 Edibles & infusions
The strength of your butter, oil or tincture in mg per gram from your lab values - online and free, without a scale.
Which scale? Pocket scale, kitchen scale or one that connects
A phone can not weigh by itself - a scale app needs a scale that sends its weight. These do:
- A scale with an RS-232 port (also a verified counter scale) + our adapter on a small ESP32-C3 board for under 15 EUR - the app gets the exact weight of your scale.
- Bluetooth scales of other makers through the free virtual scale in the browser - which ones: does my scale work?
- Build one yourself: the DIY adapter from maker boards.
- Our own scales, the UP↑SCALE 420 (3000 g / 0.1 g) and 710 (300 g / 0.01 g): the scales that gave us our name - prototypes, not for sale yet.
- Can you use a kitchen scale for weed? To weigh a harvest, yes. For an eighth, a kitchen scale with 1 g steps can be half a gram off - on 3.5 g that is about 14 %. For flower a scale with 0.1 g steps is better, for concentrates 0.01 g.
- How do you calibrate a weed scale? With a known weight, ideally at least a third of the capacity of the scale: preferably a test weight (OIML R 111, e.g. class M1 or F2) - not the weight printed on a package. Our scales have a calibration wizard in the app (also with 2 or 3 weights); a scale on the adapter or a Bluetooth scale of another maker is calibrated the way its maker says.
- On the phone: the app runs in Chrome, Edge or Opera on Android, Windows, macOS, Linux and ChromeOS - nothing to install. On an iPhone or iPad it needs a browser with Web Bluetooth.
Manual: calibration, which weight?
Free, PRO and ENTERPRISE
| Edition | For the cannabis scale |
|---|---|
| FREE | grams, eighths, ounces; mg of THC / CBD and the price live; jars and QR labels; take-away; the infusion calculator and the servings by mg; labels as PNG; lot numbers on the THING; 5 items in stock; the nutrition diary with daily limits - no time limit |
| PRO | label printers; the sales mode and the sales log; up to 250 items in stock with the loss; the lot store (420 lots); the CCLUB mode; tracking without the 15-minute limit; the factory mode for molds; CSV exports - 119.90 EUR once or from 4.43 EUR a month |
| ENTERPRISE | everything of PRO, plus logins and roles, the activity log, numbered and chained records and sealed exports anybody can check - 599.00 EUR once or from 13.00 EUR a month |
Every scale can try everything of PRO and ENTERPRISE for 14 days for free, once. What stays free
Only where it is legal - and what the law asks
- Made for the places where cannabis is legal: adults at home, licensed shops and dispensaries, and cannabis social clubs (Anbauvereinigungen in Germany). Check the law where you live.
- Selling by weight needs a verified scale in most countries - in the USA a scale with an NTEP certificate (mostly accuracy class II), registered with the weights and measures office. The app and the adapter are not verified and have no NTEP certificate: plug the adapter into your verified scale with EXACT WEIGHT - the display of that scale stays the reading for the sale, the app keeps the records.
- Pre-packed flower: check your lots along NIST Handbook 133 with the 3 % moisture allowance for cannabis (plant material) and a lot report - your own check, not an inspection.
- No seed-to-sale system: UP↑SCALE is no state tracking system and makes no claim that it meets the rules of one.
- No medical advice: the THC values are your lab values and the calculations are estimates.
No legal advice: check the rules of your state or country.
The limits - honestly
- The THC is as good as your lab values: the scale weighs exactly, the mg are your mg per gram times the weight. Without a lab report, the values are guesses.
- An infusion is an estimate until a lab tests it: the presets of the extraction efficiency are rough averages.
- A scale without Bluetooth or a data port can not talk to the app - the free online infusion calculator works without a scale.
- The warning symbols are our own - the official ones of your country go on the label as a picture.
- Not a fiscal cash register and not a merchandise management system: the sales log and the stock are your own records.
Cannabis scale: questions and answers
Is there a weed scale app?
Yes: the UP↑SCALE app is a free cannabis scale app in the browser of your phone, tablet or computer - nothing to install, no account, works offline. It weighs in grams, eighths and ounces and shows the price and the mg of THC and CBD of every weighing. A phone can not weigh by itself: the app needs a scale that sends its weight - a scale with an RS-232 port and our adapter, a supported Bluetooth scale through the free virtual scale, or one of our scales.
How many grams are in an eighth of weed?
3.54 g: an eighth of an ounce, and an ounce is 28.35 g. In everyday talk an eighth is 3.5 g, a quarter 7 g, a half 14 g and an ounce 28 g. The UP↑SCALE weighs directly in eighths, with the price and the THC of that amount.
How much THC is in a gram of weed?
The THC % of the lab label times 10 in mg: 21 % THC is 210 mg per gram, so 3.5 g hold 735 mg. Raw flower mostly has THCA: THC after decarbing = THC % + THCA % × 0.877. Save the values with the strain and the scale shows the mg of every weighing live.
How do I calculate the THC in homemade edibles?
Cannabis (g) × (THC % + THCA % × 0.877) × 10 gives the mg of THC after decarbing; times the extraction efficiency (about 70 % for butter) and divided by the strained infusion in grams gives mg per gram. The infusion calculator of the app weighs every step, saves the infusion as a THING and the servings calculator splits a batch into portions of exactly 5 or 10 mg. Try it online: cannabutter calculator. Only an estimate - a lab test is exact.
Can you use a kitchen scale for weed?
For a harvest, yes; for an eighth it is too coarse: a kitchen scale with 1 g steps can be half a gram off, about 14 % of 3.5 g. For flower a scale with 0.1 g steps is better, for concentrates 0.01 g.
How do I know how much weed is left in my jar?
Save the weight of the empty jar with the strain once and stick its QR label on the jar. Put the full jar on the scale and scan the code: the app takes the jar off and shows the weed inside, its THC and its value - without opening the lid. The take-away mode shows what you take out and its price.
How do I calibrate a weed scale?
With a known weight, ideally at least a third of the capacity: preferably a test weight (OIML R 111, e.g. class M1 or F2), never the weight printed on a package. Our scales have a calibration wizard in the app, also with 2 or 3 weights; a scale on the adapter or a Bluetooth scale of another maker is calibrated the way its maker says.
How much weight does cannabis lose when it dries?
Most of it: fresh flowers have about 75-80 % water (an estimate), and dried flowers usually keep 10-12 %. Target = start weight × dry matter ÷ (100 % − final moisture), e.g. 1,000 g fresh with 22 % dry matter dried to 11 % = about 247 g. The tracking mode with the drying preset calculates it, shows the estimated moisture live and gives an alarm at the target.
Is the cannabis scale app free?
Yes, the weighing is free for ever: grams and eighths, mg of THC and CBD, the price, jars and QR labels, take-away, the infusion calculator, servings and labels as PNG. PRO (119.90 EUR once or from 4.43 EUR a month) adds label printers, the sales mode, stock of up to 250 items, the lot store and the club mode; ENTERPRISE adds logins and sealed records. Every scale can try everything for 14 days for free.
Can a dispensary sell with the app?
With a verified scale: selling by weight needs a verified scale, in the USA one with an NTEP certificate. The app and the adapter have none - plug the adapter into your verified scale, its display stays the reading for the sale, and the app keeps the price, the label, the stock and the sales log. More: dispensary scale.
More in detail
All jobs in short: For what? · your kind of work: For whom?
Cannabis social club software (KCanG)
The KCanG documentation workflow and a checklist of every record point - done while weighing.
21 CFR Part 11 audit trail & data integrity
Who, when, what and why in the scale - mapped to Part 11, EU GMP Annex 11 and ALCOA+, point by point, with the limits.
Device qualification: time sync & WORM storage
No clock in the scale, no WORM disk? Lock the time and the storage of every device - with templates, form and a signed record.
QA guide: computer system validation of a balance
Introducing it in a regulated lab: the QA tasks, what the app takes over, IQ / OQ / PQ, an estimate of the effort and the steps to the sign-off.
Pipette calibration & check
Gravimetric pipette calibration along ISO 8655-6, step by step on your lab balance: the scale takes every value, the uncertainty, the CMC, the register.
Daily balance check
USP <41> repeatability and minimum weight, Ph. Eur. 2.1.7, trade and HACCP checks in one minute a day.
Scale calibration & test suite
Eccentricity, linearity, repeatability and every other test of OIML R 76-1 Annex A at the scale, with checklist and final report.
℮ mark prepackage control
The 3 packers' rules, the sample plan, T1 / T2 and the lot report, step by step.
Tamper-evident sales records
Numbered, chained, sealed and checked by the scale - for an inspection.
Inventory by weight, lots & bags
Stock by weight with the loss, a lot number generator and store, fill weighing into bags and the sales log - on the scale.
Food scale app: nutrition, calories & carbs
Calories and macros live with the weight, 8000+ foods offline, barcodes, bread units for diabetics, the values of a cooked pot - and a food diary for the whole family.
Baking scale app: baker's percentage & sourdough
Recipes in baker's percentage scaled to any batch and weighed step by step, the true hydration of your dough with levain or poolish, the water temperature for your dough and the sourdough starter fed on time.
Coffee scale app: espresso & pour-over
A live picture of your pour-over and your shot moved by your scale, the coffee in the jug measured, a coach for every pour, the first drops timed, your portafilters remembered, 50+ published recipes ready to load and to share - and your brew history.